STATUS QUO OF THE STUDY ON SUBGRADE DISEASES AND THE TREATMENT TECHNIQUES IN KARST AREA

Abstrcat Covering 3.63 million km~2of soluble rocks, China is one of the countries with most extensive distribution of karst. With the development of national economics, karst features have become a serious problem to the traffic constructions such as highway and railway. During the last decades, scientists and engineers have got great progresses in the treatment of karst features in construction. In this paper, based on the new publication, the authors try to summarize the new achievements in karst investigation, stabilities and risk assessment of caves, experiment and prediction of karst collapse, and the treatment of karst features in highway construction.